We report a measurement of the CP-violation parameter φ1 obtained in a time-dependent analysis of B⁰→D⁽*⁾⁰h⁢⁰ decays followed by D⁰→K⁰s ⁢π+⁢π− decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is φ1=11.7°±7.8°(stat)±2.1°(syst). Treating sin⁡2⁢φ1 and cos⁡2⁢φ1 as independent parameters, we obtain sin⁡2⁢φ1=0.43±0.27⁢(stat)±0.08⁢(syst) and cos⁡2⁢φ1=1.06±0.33⁢(stat)+0.21 −0.15⁢(syst). The results are obtained with a full data sample of 772×1⁢0^6 BB pairs collected near the Υ⁡(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+⁢e− collider.

Measurement of the CKM angle φ₁ in B⁰→D⁽*⁾⁰h⁰, D⁰→K⁰s⁢π+⁢π− decays with time-dependent binned Dalitz plot analysis

F. Tenchini;
2016-01-01

Abstract

We report a measurement of the CP-violation parameter φ1 obtained in a time-dependent analysis of B⁰→D⁽*⁾⁰h⁢⁰ decays followed by D⁰→K⁰s ⁢π+⁢π− decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is φ1=11.7°±7.8°(stat)±2.1°(syst). Treating sin⁡2⁢φ1 and cos⁡2⁢φ1 as independent parameters, we obtain sin⁡2⁢φ1=0.43±0.27⁢(stat)±0.08⁢(syst) and cos⁡2⁢φ1=1.06±0.33⁢(stat)+0.21 −0.15⁢(syst). The results are obtained with a full data sample of 772×1⁢0^6 BB pairs collected near the Υ⁡(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+⁢e− collider.
2016
Vorobyev, V.; Adachi, I.; Aihara, H.; Asner, D.  M.; Aushev, T.; Ayad, R.; Badhrees, I.; Bahinipati, S.; Bakich, A.  M.; Behera, P.; Bhardwaj, V.; Bhu...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1250360
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